Loans (Summary Of Loan Risk Ratings By Loan Class) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1,423,757	$ 1,399,764	$ 1,318,625
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,390,855	1,366,449
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,342	10,122
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	16,210	18,141
Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,350	5,052
Total Commercial Related Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,221,841	1,197,830	1,122,017
Total Commercial Related Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,189,941	1,165,489
Total Commercial Related Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,305	10,082
Total Commercial Related Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	16,117	18,047
Total Commercial Related Loans [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,478	4,212
Total Commercial Related Loans [Member] | Builder & Developer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	163,839	184,402	164,637
Total Commercial Related Loans [Member] | Builder & Developer [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	160,995	179,897
Total Commercial Related Loans [Member] | Builder & Developer [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	546	1,832
Total Commercial Related Loans [Member] | Builder & Developer [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	207	581
Total Commercial Related Loans [Member] | Builder & Developer [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,091	2,092
Total Commercial Related Loans [Member] | Commercial Real Estate Investor [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	230,981	230,827	248,785
Total Commercial Related Loans [Member] | Commercial Real Estate Investor [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	223,751	224,822
Total Commercial Related Loans [Member] | Commercial Real Estate Investor [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,710	360
Total Commercial Related Loans [Member] | Commercial Real Estate Investor [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,278	4,339
Total Commercial Related Loans [Member] | Commercial Real Estate Investor [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	242	1,306
Total Commercial Related Loans [Member] | Residential Real Estate Investor [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	222,940	209,414	199,017
Total Commercial Related Loans [Member] | Residential Real Estate Investor [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	216,408	204,139
Total Commercial Related Loans [Member] | Residential Real Estate Investor [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,008	4,065
Total Commercial Related Loans [Member] | Residential Real Estate Investor [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	683	711
Total Commercial Related Loans [Member] | Residential Real Estate Investor [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	841	499
Total Commercial Related Loans [Member] | Hotel/Motel [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	75,074	63,195	69,528
Total Commercial Related Loans [Member] | Hotel/Motel [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	75,074	63,195
Total Commercial Related Loans [Member] | Hotel/Motel [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Total Commercial Related Loans [Member] | Hotel/Motel [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Total Commercial Related Loans [Member] | Hotel/Motel [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Total Commercial Related Loans [Member] | Wholesale & Retail [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	102,673	103,040	93,368
Total Commercial Related Loans [Member] | Wholesale & Retail [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	96,259	95,128
Total Commercial Related Loans [Member] | Wholesale & Retail [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	394	254
Total Commercial Related Loans [Member] | Wholesale & Retail [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,020	7,658
Total Commercial Related Loans [Member] | Wholesale & Retail [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Total Commercial Related Loans [Member] | Manufacturing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	67,466	62,510	40,254
Total Commercial Related Loans [Member] | Manufacturing [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	63,222	58,082
Total Commercial Related Loans [Member] | Manufacturing [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	580	588
Total Commercial Related Loans [Member] | Manufacturing [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,664	3,840
Total Commercial Related Loans [Member] | Manufacturing [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Total Commercial Related Loans [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	62,565	59,931	55,613
Total Commercial Related Loans [Member] | Agriculture [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	59,794	57,140
Total Commercial Related Loans [Member] | Agriculture [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,331	2,476
Total Commercial Related Loans [Member] | Agriculture [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	136	0
Total Commercial Related Loans [Member] | Agriculture [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	304	315
Total Commercial Related Loans [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	296,303	284,511	250,815
Total Commercial Related Loans [Member] | Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	294,438	283,086
Total Commercial Related Loans [Member] | Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	736	507
Total Commercial Related Loans [Member] | Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,129	918
Total Commercial Related Loans [Member] | Other [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Total Consumer Related Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	201,916	201,934	196,608
Total Consumer Related Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	200,914	200,960
Total Consumer Related Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	37	40
Total Consumer Related Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	93	94
Total Consumer Related Loans [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	872	840
Total Consumer Related Loans [Member] | Residential Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	80,826	79,325	73,134
Total Consumer Related Loans [Member] | Residential Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	80,542	79,068
Total Consumer Related Loans [Member] | Residential Mortgages [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9	10
Total Consumer Related Loans [Member] | Residential Mortgages [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	84	85
Total Consumer Related Loans [Member] | Residential Mortgages [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	191	162
Total Consumer Related Loans [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	97,646	97,950	94,987
Total Consumer Related Loans [Member] | Home Equity [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	97,189	97,498
Total Consumer Related Loans [Member] | Home Equity [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Total Consumer Related Loans [Member] | Home Equity [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Total Consumer Related Loans [Member] | Home Equity [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	457	452
Total Consumer Related Loans [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	23,444	24,659	$ 28,487
Total Consumer Related Loans [Member] | Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	23,183	24,394
Total Consumer Related Loans [Member] | Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	28	30
Total Consumer Related Loans [Member] | Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9	9
Total Consumer Related Loans [Member] | Other [Member] | Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 224	$ 226